Sanyo PDP-42WV1 Service Manual page 19

I Power Fail Circuit
Sub CPU (IC801) is programmed that the set goes to standby mode when there is circuit fail
as below. (Refer to "Power Supply Lines: P18)
1. Power Fail 1 : Detected the low voltage fail in Main board. (From 1.5V to 5V)
2. Power Fail 2 : Detected the High voltage fail in Main board. (13V)
3. Power Fail 3 : Detected the fail of Audio AMP IC (IC101).
4. Power Fail 4 : Detected the voltage fail of Interface Board (Option).
5. Temperature Fail : Detected the fail of Temperature Sensor IC (IC1881/1891).
6. Panel Fail (ALARM) : Detected the fail of PDP Module.
Note: In case of Panel Fail (ALARM), the set does not go to standby mode. (Only "PDP_GO" line is off.)
IC801
P FAIL 1
P FAIL 2
P FAIL 3
P FAIL 4
TEM. FAIL 1
TEM. FAIL 2
PANEL FAIL
POWER
ON/OFF
PDP GO
Low Voltage (1.5V - 5V) Fail Detect
82
(High: Normal, Low: Fail)
High Voltage (13V) Fail Detect
83
(High: Normal, Low: Fail)
Sound AMP. Fail Detect (To IC101 19 )
84
(Low: Normal, High: Fail)
(Option) Interface Board Voltage Fail Detect
85
(High: Normal, Low: Fail)
92
Temperature Fail Detect (To IC1891 2 )
93
Temperature Fail Detect (To IC1881 2 )
Panel Module Fail Detect
79
(High: Normal, Low: Fail)
Standby ON/OFF
49
(High: ON, Low: OFF)
PDP Module ON/OFF
86
(High: ON, Low: OFF)
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